Given that the acceleration vector is a(t)=(−9cos(−3t),−9sin(−3t),−t), the initial velocity is v(0)=(1,0,1), and the initial position vector is r(0)=(1,1,1), compute:

the first, second, and fifth options

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

happy to

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1/0.14nm = 10^10/1.4 a lot